Force

In physics, force is a push or a pull that changes or tends to change the state of rest or uniform motion of an object or changes the direction or shape of an object. Force causes objects to accelerate, add to the object's overall pressure, change direction, or change shape. Force is measured in Newtons. (N).

A force is always a push, pull, or a twist, and it affects objects by pushing them up, pulling them down, pushing them to a side, or by changing their motion or shape in some other way.

where is the force, is the mass of an object,
and is the acceleration of the object.

This formula says that when there is a force on an object then it will move faster and faster. If the force is weak and the object is heavy, then it will take a long time to increase the speed very much, but if the force is strong and the object is light, then it will move a lot faster very quickly.

Gravity is a force. Everything that weighs something is being pulled by gravity.

One can take the equation above and change to the standard gravityg, then a formula about the gravity on earth can be found:

where is the weight of an object, is the mass of an object,
and is the acceleration due to gravity at sea level. It is about .

This formula says that when you know the mass of an object, then you can calculate how much force there is on the object because of gravity. You must be on earth to use this formula. If you are on the moon or another planet, then you can use the formula but g will be different.

Force is a vector, so it can be stronger or weaker and it can also point in different directions. Gravity always point down into the ground (if you are not in space).